Male G-spot massage, reduce in quality of semen?

Me and a friend where joking around today with sex-jokes and stuff like that, mostly towards putting stuff up the ass, for some reason. I dont know why, but it got to it.
Then he told me that he had read some place that the male g-spot is also called the ''red button''. Its called this because when you stimulate it or even touch it, the quality of semen gets reduced and it may be a little bit more difficult to get babies.

This guy says alot of weird things from time to time, and do attend to lie in some situations, but this did sound like it could be true. So thats why im asking you guys;

Is my friend right about this, or has he totally lost his mind and came up with an significant lie i almost believed in?

Thanks for that, while having that out of my mind i might get back to my thoughts of ''experimenting'' with my body. Allthough i do find it weird to take something up there.
Ive talked to my girl about it and she is neutral to it while im kind of ''scared''? But.. With great experience comes great knowledge or something, right?